[Veritas-bu] block size for restore
2009-02-18 14:45:24
This one has me stumped.
Windows 2003 with all the latest patches.
Media written since 2003 shows up in the bpimagelist -L as having a
media block size of 65536.
Upgrade to 6.5.3
SIZE_DATA_BUFFERS must now be 32768 because if it is anything else, I
get media write errors.
When I try and restore data, the bptm logs show this
2/17/2009 1:46:05 PM - Error bptm(pid=1996) tapemark or blank tape
encountered reading media header, drive index 1
2/17/2009 1:46:06 PM - Error bptm(pid=1996) The tape device at index 1
has a maximum block size of 32768 bytes, a buffer size of 65536 cannot
be used
2/17/2009 1:46:06 PM - Error bptm(pid=512) The following files/folders
were not restored:
I cannot read the old LTO-1 tapes. They were stored at Iron Mountain
safely, and I tried more than three tapes from various years.
I verified the hotfix numbers for tape.sys and even tried updated tape
drive drivers with no success.
NB docs (perf tuning guide) say the SIZE_DATA_BUFFERS is not even used
during a restore operation.
Is there a registry key that is forcing the drive to only accept 32k
blocks?
The LTO-4 drive is working just fine even at the 32k block size.
-Jon Bousselot
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